public BlobChunkVerificationResultInfo Verify(BlobTransportStreamAuthentication expectedAuthentication,
long blobSize)
{
var result = BlobChunkVerificationResultInfo.ValidResult;
if (BlobSize != blobSize)
{
result = new BlobChunkVerificationResultInfo(BlobChunkVerificationResult.InvalidBlobSize,
BlobChunkVerificationResultContext.Footer, BlobSize);
}
else if (Authentication < 0 || Authentication >= BlobTransportStreamAuthentication.kMax)
{
result = new BlobChunkVerificationResultInfo(BlobChunkVerificationResult.InvalidAuthentication,
BlobChunkVerificationResultContext.Footer, Authentication);
}
else if (Authentication != expectedAuthentication)
{
result = new BlobChunkVerificationResultInfo(BlobChunkVerificationResult.AuthenticationMismatch,
BlobChunkVerificationResultContext.Footer, Authentication);
}
else if (CalculateAssumedAuthenticationDataSize() != Authentication.GetDataSize())
{
result = new BlobChunkVerificationResultInfo(BlobChunkVerificationResult.InvalidAuthenticationSize,
BlobChunkVerificationResultContext.Footer, CalculateAssumedAuthenticationDataSize());
}
return(result);
}
void OpenVerifyAssumedStreamSize(ref BlobChunkVerificationResultInfo result)
{
if (AssumedStreamSize < kSmallestStreamLength)
{
result = new BlobChunkVerificationResultInfo(BlobChunkVerificationResult.StreamTooSmall,
BlobChunkVerificationResultContext.Stream, AssumedBlobSize);
}
}
BlobChunkVerificationResultInfo VerifyEofAuthentication()
{
var result = BlobChunkVerificationResultInfo.ValidResult;
byte[] hash = BuildAuthenticationData();
if (hash != null)
{
bool hashes_equal = hash.EqualsArray(mFooter.AuthenticationData);
if (!hashes_equal)
{
result = new BlobChunkVerificationResultInfo(BlobChunkVerificationResult.AuthenticationFailed,
BlobChunkVerificationResultContext.Stream);
}
}
return(result);
}
BlobChunkVerificationResultInfo VerifyEnoughBytesForChunkOrData(long totalSize)
{
var result = BlobChunkVerificationResultInfo.ValidResult;
if (UnderlyingStream.IsWriting && EndPosition.IsNone())
{
return(result);
}
long bytes_remaining = BaseStream.BytesRemaining(EndPosition);
if (bytes_remaining < totalSize)
{
result = new BlobChunkVerificationResultInfo(BlobChunkVerificationResult.EndOfStream,
BlobChunkVerificationResultContext.Stream, bytes_remaining);
}
return(result);
}
